sfc: Add channel specific receive_skb handler and post_remove callback

Allows an extra channel to override the standard receive_skb handler
and also for extra non generic operations to be performed on remove.

Also set default rx strategy so only skbs can be delivered to the
PTP receive function.

Signed-off-by: Stuart Hodgson <smhodgson@solarflare.com>
Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>

1 files changed, 11 insertions, 2 deletions

diff --git a/drivers/net/ethernet/sfc/rx.c b/drivers/net/ethernet/sfc/rx.c
index e997f83f14f5..9e0ad1b75c33 100644
--- a/drivers/net/ethernet/sfc/rx.c
+++ b/drivers/net/ethernet/sfc/rx.c
@@ -575,7 +575,10 @@ static void efx_rx_deliver(struct efx_channel *channel,
         skb_record_rx_queue(skb, channel->rx_queue.core_index);
 
         /* Pass the packet up */
-        netif_receive_skb(skb);
+        if (channel->type->receive_skb)
+                channel->type->receive_skb(channel, skb);
+        else
+                netif_receive_skb(skb);
 
         /* Update allocation strategy method */
         channel->rx_alloc_level += RX_ALLOC_FACTOR_SKB;
@@ -617,7 +620,8 @@ void __efx_rx_packet(struct efx_channel *channel, struct efx_rx_buffer *rx_buf)
         if (unlikely(!(efx->net_dev->features & NETIF_F_RXCSUM)))
                 rx_buf->flags &= ~EFX_RX_PKT_CSUMMED;
 
-        if (likely(rx_buf->flags & (EFX_RX_BUF_PAGE | EFX_RX_PKT_CSUMMED)))
+        if (likely(rx_buf->flags & (EFX_RX_BUF_PAGE | EFX_RX_PKT_CSUMMED)) &&
+            !channel->type->receive_skb)
                 efx_rx_packet_gro(channel, rx_buf, eh);
         else
                 efx_rx_deliver(channel, rx_buf);
@@ -627,6 +631,11 @@ void efx_rx_strategy(struct efx_channel *channel)
 {
         enum efx_rx_alloc_method method = rx_alloc_method;
 
+        if (channel->type->receive_skb) {
+                channel->rx_alloc_push_pages = false;
+                return;
+        }
+
         /* Only makes sense to use page based allocation if GRO is enabled */
         if (!(channel->efx->net_dev->features & NETIF_F_GRO)) {
                 method = RX_ALLOC_METHOD_SKB;